Stave machine



June 8 1926,

w. H. BROWN STAVE MACHINE I 4 Sheets-Sheet 1 Filed July 5, 1922 f 111120112711." I Vlfilhammmm June 8,1926. 1,588,345 I I w. H. BROWN I sTAVE MACHINE Filed July 5, 1922 4 Sheets-Sheet 2 W. H. BROWN STAVE MACHINE June 8 1926. v 1,588,345

Filed July 5 1922 4 Sheets-Sheet 3 I [12 126142101 mlluunwmwn June 8 1926. 1,588,345

W. H. BROWN I STAVE MACHINE Filed July's, 1922 4 Sheets-Sheet 4 '3 I ii ail/away Patented June 8, 1926.

UNITED STATES WILLIAM BROWN, OF WI'NCHENDON, MASSACHUSETTS, ASSIGNOR TO THE BROWN PACKAGE COMPANY, OF MASSACHUSETTS.

Application filed July 3,

This invention relates to stave forming machines and the like and particularly to a machine for giving to such .an article as a stave blank the desired edge angle and longitudinal taper, while at the same time forming a tongue and. groove on its opposite edges. I p

In machines of this sort the several factors involved make it diiiicult to provide for accurate adjustment for any considerable difference in size either as to length or as to the diameter of the package to'be produced. It has furthermore been found difficult in machines involving more Ithanone of these operations to get-a proper feed of the work and a 'properspeed of operation.

In accordance with-my present invention I am able to combine the abovementioned operations with a maximum degree of adjustment and ofspeed and at the same time handle the work in a manner most convenient for subsequent operations. 7

As illustrative of myv invention, I hav shown in the accompanying drawings an embodiment which involves convenient construction of .parts and'satisfactory combinations-of elements, although it will be understood that the machine may be "variously modified in structure, combination and design. Throughout the specification and drawings like reference characters are employed to indicate correspondingparts and in the drawings:

Fig. 1 'is'a side elevation of the machine in accordance with my invention.

Fig. '2 is a plan view thereof.

Fig. 3 isa section onthe line -33 of .Fig. 2 and Figs. 4: and 5 are diagrammaticillustrations of the slide movement.

In the embodiment of my invention shown in thedrawings Iprovide a suitable bed 1 mounted at a convenient level on legs 2 and provided at one end with an adjustable hopper 3 for supporting a column of stave blanks which are to "be beveled, tapered and matched by the machine. The bed 1 is provided with a longitudinal 'slideway 4 in which is-mounteda reciprocating work slide which preferably is formed as an open rectangular frame comprising side rails 5 and cross bars 6. Anchoredto the cross bars'6 and extending beneath and beyond the'hopper 3 is a narrow central longitudinal "work support 5 on-w'hich is a feed dog ,5 for WINCHENDON, MASSACHUSETTS, A CORPORATION OF STAVE MACHINE.

1922. Serial No. 572,464.

engaging the. end of the stave and feeding it to the cutters. Depending from the bed 1 is a pair of spaced brackets 7 Within which are journaled oppositely disposed studs 7. Pivoted .on studs 7 below the slideway isa pair of transversely disposed spindle heads 8. These heads 8 .a-remounted .to :be adjusted about the studs 7 and :be held each by a nut 9 threaded on'a fixed bolt 10 in any .de-. sired angle of position. The bolts 10 are set through .the brackets 7 andthe heads 8 are provided with elongatedqslots 10 (Fig. .3) to receive said bolts, theseslots permitting; a limited arcual adjustment of the heads relativeto the brackets. Each head -8 is .provided between its ends withan angularlydisposed slideway 11 within which reciprocate spindle slides 12, the slides 12 havingspind-le bearings 13 in which are mounted cutter spindles 14. In. the lower offset side of-each slide12-is mounted .a motor 15 whose armature shaft 15 is aligned with and'connected to the cutter spindle 1 1 so .as to providea direct'and independent drive for each cutter. On the lower face of the bed-'1 and on each side. of the slideway 4: is :a transverse slideway 16 in which is mounteda slide 17 carry ing on its upper face a roller stud 18 which projects up through-'the opening of 'the work slide frame 5 and into the slot 19 of a and'the other the groove on opposite sides o'fthe stave. Each'stud carrying slide 17f-is connected to thespindle carrying slide l2-by a link 21, so'that as the work slide carrying the guide or templet 19 is-advance'd longitudinally, the slide 17-is'moved'transversely of the machine under the influence of the angularly disposed slot 19"and throughthe medium of the link .21 moves the-spindle slide 12 also transversely of themachine and thus presenting itscutter accurately ELIlClZUHiformly -to the'edge of the slab or stave blank 13.

springs 23, the bar being carried in a pair of yokes2d which span the slideway oi the machine. The accurate advance of the cutters in the true plane to which they areswung and adjusted and which is at right angles to. the radius of curvature of the stave and accurately centered on the edge of the stave, is very important. It will be seen that it the cutter spindle should rock during its. advance to form a taper, the tongue or groove would depart from the center of the stave edge and in case of a stave of any length would run oil. By arranging the spindle slides 12 at an angle to the horizontal slides 17, which latter slides are operated from the templet 19 and are operatively connected with the angularly disposed spindle slides 12,-

motion is imparted to the cutter spindles which is the resultant of a horizontal and a vertical tendency so that the centers of the cutters are maintained against the edges oi the stave approximately centrally of the depth of the stave throughout the entire travel ot the stave past-the cutters. V 7

The pieces which form the stave hopper are angular members disposed to engage the corners of the blanks or stave slabs S, the

two outer pieces being adjustable relativeto the two inner pieces as indicated at 3,"-to

accommodate staves of different length. The sta-ves S feed automatically by gravity,

, the lower stave being supported by the elongated end of the support 5. When the dog 5 engages the rear end of the stave the slide begins to return, pulling out the bottom stave and advancing it towards the cutter.

The reciprocation of the. work slide 5'is by'v a drive at the base of the machine. transverse'power shaft is. provided at on which is a small gear 25nieshing with a large gear 26 and driving a cam faced gear 27 meshing with a corresponding gear 28 which rocks a vertical lever 29 by a link 29. The upper end of the vertical lever is slotted as at 29 and one end-of .a link 35 is adjustably pivoted within the slot 29 The link is connected at its opposite end to the lower side of the work slide 5 and by the proper proportioning of the gears, the

slide is given a fast motion in its travel between the stave hopper and the cutters and a slow motion-past the cutters.

The finished staves'are withdrawn from the work support 5 bya pointed dog 30 positioned at the extreme feed movement of the slide 5' and having a curved beak by which it is adapted to ride over the end of the stave andagainst the tendency of gravity; A weight 31 is provided on the dog 30 suiiicient to cause its sharpened point 30' to .is ready for operation.

catch in the face of the stave and hold it against the return motion of the slide.

In adjusting the machine, the diameter of the package orpail and the corresponding width of the stave-to be used is determined. The stave blanks are then sawed with the required curvature from the blank slabs of the required thickness. These slabs are fed into the pieces 3 which form the stave hopper, adjustment being made for the length of the stave. The spindle heads 8 are then swung on their pivots 7 and clamped .lirmly to give to thecutter spindles proper radial angle at the edge of the stave and the lateral guides are adjusted to give the desired taper. The end of the link 35 is set in the slot-29 of the lever 29 so as to give the required length of t ,row'to the slide and the machine the cutter spindles 14 is turned on and the power shaft 25 started. The slide 5 is advanced and the cutters taper, bevel and joint the edges with absolute accuracy and uniformity.

Various modifications in the details of structure and arrangement oi the parts, as well as thcsubstitution or equivalent devices 7 and movements, may all be made each without departing from the spirit of 'my invention it within the limits of the appended claims. l 7

What I thereforeclaim and desire to secure by Letters Patent is:

1. In a machine for tongue and grooving and tapering pail staves, a frame having a longitudinal slideway, a work slide movable in said slideway, a pair of transversely disposed spindleheads, means for angularly adjusting said spindle heads, each of said heads having a slideway disposed transversely of the machine, a spindle slide in 'each of. said slideways and having a suit-- able spindle bearing, a cutterspindle in said bearing of each slide, cutters 'niountedon the upper ends of said spindles and positionable adjacent the line of travel of the work slide,'templets adjustably supported at each end and disposed longitudinally of the inachine on each side of the main slide, a

transverse slide on each side of the machine F mounted on'suitable slideways, templet engaging'members on each of said transverse slides, and a connection between the last mentioned transverse slides and the spindle slidess 2. In a machine for tongue and grooving and tapering pail staves, a frame having a longitudinal slideway, an open slide movable in said slideway and having a central longitudinally disposed stave support, a stave hopper disposed at one end of said slideway, a feed device on the slideway and. disposed to engage and draw the bottom stave from the hopper, a pair of transversely disposed spindle heads pivoted to the frame below the slidewa-y, means for adjustably holding said heads in angular adjustment on their pivots, each of said heads havinga slideway disposed transversely of the machine, a spindle slide in each of said slideways, and having a suitable spindle bearing, a cutter spindle in each bearing, cutters mounted on the upper ends of said spindles and positionable adjacent the line of travel of the stave support of the slide, slotted templets adjustably supported at each end and disposed longitudinally of the machine on each side of the main slide and across the open slide, a transverse slide on each side of the machine mounted on suitable slideways, said transverse slide having engaging members pro-- jecting within the slots of the templets, and a link connecting the last mentioned transverse slides with the spindle slides.

3. In a machine for tongue and grooving and tapering pail staves, a stave blank,

guideway, means for advancing a stave blank therealong, a templet, a pair of rotary tongue and groove stave-tapering cutters pivotally mounted at opposite sides of said guideway, and means operated from said templet for imparting to said cutters a motion'which is theresultant of a horizontal and a vertical tendency effective to constantly'maintain the centers of the cutters against the edges of the stave blank approximately vcentrally midway I between the faces of said blank throughout the entire travel of the blank past said cutters.

4:. In a machine for tongue and grooving and tapering pail staves, a stave blank guideway, means for advancing a stave blank therealong, a templet, a pair of rotary tongue and groove stave-tapering cutters pivotally mounted at opposite sides of said guideway angularly disposed slides carry- 1ng said cutters, and horizontally disposed. 

